Sometimes, the google recaptcha not working ate IE. Show me this log message:

ReCAPTCHA couldn’t find user-provided function: recaptchaCallback

I mean sometimes because it is not always. If I did Ctrl + F5, the recaptcha appears, but if you access the page normally, through link, for example, or recaptcha does not appear, and displays the message in the console.

The recaptcha is the recaptcha of the wordpress plugin Contact Form 7.